Article
Materials Science, Multidisciplinary
Qiyan Zhang, Xin Chen, Bing Zhang, Tian Zhang, Wengchang Lu, Zhe Chen, Ziyu Liu, Seong H. Kim, Brian Donovan, Ronald J. Warzoha, Enrique D. Gomez, J. Bernholc, Q. M. Zhang
Summary: This research demonstrates a strategy to reduce weak points in polymers by utilizing interchain electrostatic forces in polymer blends, leading to significant enhancements in dielectric breakdown strength.
Article
Materials Science, Multidisciplinary
Tianqing Li, Hongxiang Zong, Fuhai Zhao, Xiangdong Ding, Turab Lookman, Jun Sun
Summary: The calorimetric and dynamical glass transitions are decoupled in high entropy metallic glasses (HEMGs), and the underlying mechanism and connection to atomic structure are not understood. Molecular dynamic simulations are performed to investigate the glass transition behavior of different HEMG model systems. It is found that the effect of mismatch entropy plays a critical role in decoupling vitrification kinetics/α-relaxation in HEMGs, and the atomic size difference contributes significantly to the sluggish diffusion and decreased dynamic heterogeneities.
Article
Materials Science, Multidisciplinary
J. Shen, Y. H. Sun, J. Orava, H. Y. Bai, W. H. Wang
Summary: Liquid-to-liquid transition (LLT) in metallic liquids and its relationship with liquid dynamics were studied through in-situ vitrification, annealing, and heating processes. Isothermal-annealing induced forward and heating initiated reversible LLTs were detected, and the LLT mechanisms were revealed by controlling the annealing temperature. A two-step-like increase in specific heat reflected the coexistence of two distinct liquids. This study not only enhances our understanding of LLTs in metallic and molecular liquids, but also uncovers a unique first-order glass-to-glass transition in multi-component metallic systems.
Article
Materials Science, Multidisciplinary
Solene Comby-Dassonneville, Gabrielle Tiphene, Alejandro Borroto, Gaylord Guillonneau, Lucian Roiban, Guillaume Kermouche, Jean-Francois Pierson, Jean-Luc Loubet, Philippe Steyer
Summary: This study reports the use of a new high-temperature scanning indentation technique to monitor the physical changes in thin-film metallic glasses in situ during heat treatment. The mechanical evolution and physical evolutions of ZrCu TFMG were successfully characterized, including the metallic glass-to-supercooled liquid transition and crystallization process. The HTSI results showed excellent agreement with other analytical methods and provided key kinetic information on small-scale systems.
APPLIED MATERIALS TODAY
(2021)
Article
Nanoscience & Nanotechnology
Limin Lai, Tianhao Liu, Xinghong Cai, Min Wang, Shengbiao Zhang, Wen Chen, Shengfeng Guo
Summary: The study introduces a series of low-cost refractory Mo-Co-B BMGs with enhanced GFA and high thermal stability, exhibiting exceptional hardness and Young's modulus.
SCRIPTA MATERIALIA
(2021)
Article
Materials Science, Ceramics
Mingyu Xie, Gan Ding, Minqiang Jiang, Faxin Li
Summary: Experimental results show that under high-frequency vibration, an irreversible internal friction peak is observed near the onset crystallization temperature in Zr41.2Ti13.8Cu12.5Ni10Be22.5 (Vit-1) bulk metallic glass. After preheating treatment, the internal friction peak decreases significantly, and the final modulus values are proportional to the crystallinity. These phenomena can be well explained through a three-parameter anelastic solid phenomenological model.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Chemistry, Physical
C. J. Chen, R. Xu, B. J. Yin, Y. Z. He, J. Y. Zhang, P. Zhang, B. L. Shen
Summary: The dynamic mechanical relaxation processes of metallic glasses were investigated in this study. The results showed that alpha relaxation was observed in the HE-MGs and Vit1 MG. The activation energies of the HE-MGs were higher than that of the Vit1 MG. The dynamic mechanical properties were discussed in light of the KWW and QPD models, indicating different dynamic heterogeneities and defect concentrations in the four MGs.
Article
Chemistry, Physical
Junzhang Ma, Simin Nie, Xin Gui, Muntaser Naamneh, Jasmin Jandke, Chuanying Xi, Jinglei Zhang, Tian Shang, Yimin Xiong, Itzik Kapon, Neeraj Kumar, Yona Soh, Daniel Gosalbez-Martinez, Oleg Yazyev, Wenhui Fan, Hannes Huebener, Umberto De Giovannini, Nicholas Clark Plumb, Milan Radovic, Michael Andreas Sentef, Weiwei Xie, Zhijun Wang, Christopher Mudry, Markus Mueller, Ming Shi
Summary: Using angle-resolved photoemission spectroscopy, the authors detected mobile bound states of excitons in quasi-one-dimensional metallic TaSe3, providing evidence for the elusive exciton mobility in metals.
Article
Nanoscience & Nanotechnology
Alireza Jalali, Mehdi Malekan, Eun Soo Park, Reza Rashidi, Ahmad Bahmani, Geun Hee Yoo
Summary: The compressive deformation behavior of Zr33Hf8Ti6Cu32Ni10Co5Al6 and Cu47Zr47Al6 alloys was studied at room temperature and high temperatures. The development of HEBMG improved ductility and fracture stress at room temperature. At high temperatures, HEBMG could withstand more stresses and had higher viscosity compared to BMG.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Multidisciplinary
Jing Jin, Michelle Wurch, Saba Baraghani, Daniel J. Coyle, Thomas A. Empante, Fariborz Kargar, Alexander A. Balandin, Ludwig Bartels
Summary: This study presents the growth of quasi-one-dimensional zirconium tritelluride using CVD technique at low temperatures and short processing times. The material shows comparable electrical conductivity to bulk and exhibits a positive temperature coefficient. Various characterization techniques were employed to validate the composition and electrical properties of the material.
CRYSTAL GROWTH & DESIGN
(2021)
Article
Chemistry, Multidisciplinary
Qiao Jin, Hu Cheng, Zhiwen Wang, Qinghua Zhang, Shan Lin, Manuel A. Roldan, Jiali Zhao, Jia-Ou Wang, Shuang Chen, Meng He, Chen Ge, Can Wang, Hui-Bin Lu, Haizhong Guo, Lin Gu, Xin Tong, Tao Zhu, Shanmin Wang, Hongxin Yang, Kui-juan Jin, Er-Jia Guo
Summary: The study reveals that by controlling the film thickness of highly crystalline CrN films, a significant reduction in electrical conductivity accompanied by unexpected volume expansion can be observed. When the film thickness reaches approximately 30 unit cells, the conductivity of CrN films is greatly reduced.
ADVANCED MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Nguyen K. Ngan, Anh D. Phan, Alessio Zaccone
Summary: The temperature dependence of reversible structural relaxation time and diffusion constant of metallic glasses under pressure is investigated in theory. External compression not only alters the glass dynamics, but also leads to the formation of a metastable state and a higher-energy state. The relaxation times in this two-state system are faster than the relaxation time without considering barrier recrossing.
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Lin Xue, Liliang Shao, Zongzhen Li, Zhida Han, Baosen Zhang, Juntao Huo, Xinming Wang, Shuaishuai Zhu, Bin Qian, Jiangbo Cheng, Baolong Shen
Summary: In this study, the magnetic behavior and magnetocaloric effect of high-entropy and medium-entropy bulk metallic glasses (BMGs) were systematically investigated. The results showed spin glass-like behavior and large magnetocaloric effect at cryogenic temperatures in all BMGs. The influence of configuration entropy on magnetic response and magnetocaloric effect was discussed. It was found that configuration entropy could alter magnetic phase transition temperature, magnetic hysteresis, and refrigeration capacity in these BMGs. However, increasing configuration entropy did not lead to distinct differences in magnetic entropy change. The BMGs in this study exhibited good glass-forming ability and promising magnetocaloric effect, making them potential candidates for cryogenic refrigerants.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Physical
Lamei Zhao, Xinran Zhang, Biao Wan, Zhuangfei Zhang, Weixia Shen, Yuewen Zhang, Chao Fang, Liangchao Chen, Qianqian Wang, Julong He, Xiaopeng Jia
Summary: In this study, a new high-pressure phase of GeTe, called Cmca phase, was predicted using first-principles calculations. It is found to be the most energetically favorable phase in the pressure range of approximately 30 to 38.5 GPa. The Cmca phase exhibits strong metallic properties and superconductivity at 35 GPa and below.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Polymer Science
Peiru Liu, Yongfeng Men
Summary: Temperature-dependent form II to I transition was investigated in low-molar-mass polybutene-1 using fast scanning calorimetry. The crystals formed in the as-crystallized sample had wide distributions of lamellar thickness and intercrystalline link densities, with the well-crystallized form II crystals showing mobility of chain segments even below the glass transition temperature. The transition from form II to form I occurred over a wide temperature range, with form I crystals transformed below the glass transition temperature having higher melting points.
Article
Multidisciplinary Sciences
Zhidan Zeng, Jianguo Wen, Hongbo Lou, Xin Zhang, Liuxiang Yang, Lijie Tan, Benyuan Cheng, Xiaobing Zuo, Wenge Yang, Wendy L. Mao, Ho-Kwang Mao, Qiaoshi Zeng
Summary: A process of synthesizing nanostructured diamond capsules (NDCs) capable of permanently preserving volatiles at high pressures is reported. The preserved pressure of the sample inside NDCs can be tuned by controlling synthesis pressure.
Article
Multidisciplinary Sciences
Kejun Bu, Qingyang Hu, Xiaohuan Qi, Dong Wang, Songhao Guo, Hui Luo, Tianquan Lin, Xiaofeng Guo, Qiaoshi Zeng, Yang Ding, Fuqiang Huang, Wenge Yang, Ho-Kwang Mao, Xujie Lu
Summary: Solids can be categorized into crystalline and amorphous states, with their properties determined by the interactions among atoms. By combining the advantages of ordered and disordered components, hybrid structures can be designed to have unique properties. The researchers discovered a nested order-disorder framework (NOF) where a crystalline matrix contains self-filled amorphous-like innards. This structure exhibits both low thermal conductivity and metallic electrical conductivity, showcasing a new category of materials that bridge crystalline and amorphous forms at the sublattice level.
NATURE COMMUNICATIONS
(2022)
Article
Materials Science, Ceramics
Ye Liu, Ziliang Yin, Hongbo Lou, Tao Liang, Hongliang Dong, Dazhe Xu, Chao Song, Qifan Wang, Songyi Chen, Xin Zhang, Xiehang Chen, Zhidan Zeng, Qiaoshi Zeng
Summary: This study systematically investigated the effects of impurities in zirconium raw materials on the properties of Zr55Cu30Al10Ni5 BMG. It was found that oxygen impurities negatively affected the glass-forming ability and plasticity of BMG, while hafnium impurities had negligible effects.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Chemistry, Physical
Ming Yang, Wenyue Li, Xiongjun Liu, Hui Wang, Yuan Wu, Xianzhen Wang, Fei Zhang, Qiaoshi Zeng, Dong Ma, Haihui Ruan, Zhaoping Lu
Summary: This study demonstrates the significance of configurational entropy (S-conf) in the glass transition process through experimental and simulation results. A higher S-conf leads to a more stable and ordered glass structure.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Jingyang Zhang, Qing Yu, Qing Wang, Jia Li, Zhibo Zhang, Tianyu Wang, Shuo Shuang, Qihong Fang, Qiaoshi Zeng, Yong Yang
Summary: This study successfully synthesized strong and ductile cermet nanosheets through the reaction between high entropy alloy nanocrystals and poly-vinyl alcohol, overcoming the brittleness issue faced by conventional cermets.
Article
Nanoscience & Nanotechnology
Tao Liang, Lianghua Xiong, Hongbo Lou, Fujun Lan, Junran Zhang, Ye Liu, Dongsheng Li, Qiaoshi Zeng, Zhidan Zeng
Summary: The mechanical properties of hexagonal silicon (Si-IV) were experimentally studied, revealing that Si-IV has similar elastic modulus and hardness to the common diamond cubic silicon. This similarity enables the integration of Si-IV into conventional Si-based devices and its potential for photovoltaic and optoelectronic applications.
SCRIPTA MATERIALIA
(2022)
Article
Chemistry, Multidisciplinary
Minhyuk Park, Qing Yu, Qing Wang, Chaojie Chen, Zhibo Zhang, Ziyin Yang, Huan Chen, Qiaoshi Zeng, Yunlong Zi, Jun Fan, Yong Yang
Summary: In this work, a series of large-sized 2D titanium nanomaterials with a unique heterogeneous nanostructure containing nanosized titanium, titanium oxide, and MXene-like phases were fabricated using the method of polymer surface buckling enabled exfoliation (PSBEE). These 2D titaniums exhibit both superb mechanical strength (6-13 GPa) and remarkable ductility (25-35%) at room temperature, surpassing all other titanium-based materials reported so far. Furthermore, the 2D titanium nanomaterials also showed good performance in triboelectric sensing and can be used to fabricate self-powered, on-skin conformal triboelectric sensors with good mechanical reliability.
Article
Multidisciplinary Sciences
Xin Zhang, Hongbo Lou, Beatrice Ruta, Yuriy Chushkin, Federico Zontone, Shubin Li, Dazhe Xu, Tao Liang, Zhidan Zeng, Ho- kwang Mao, Qiaoshi Zeng
Summary: The atomic-scale relaxation dynamics of a cerium-based metallic glass during compression were studied. It was found that the collective atomic motion initially slows down and then unexpectedly accelerates with further compression, showing an unusual nonmonotonic pressure-induced steady relaxation dynamics cross-over at around 3 GPa.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Multidisciplinary Sciences
Alexander J. Breindel, Yuhang Deng, Camilla M. Moir, Yuankan Fang, Sheng Ran, Hongbo Lou, Shubin Li, Qiaoshi Zeng, Lei Shu, Christian T. Wolowiec, Ivan K. Schuller, Priscila F. S. Rosa, Zachary Fisk, John Singleton, M. Brian Maple
Summary: This article reports the study of the conductive surface state (CSS) and bulk phase properties of FeSi, and finds that a CSS exists below 19K. Comparison with the Kondo insulator SmB6 reveals similar behavior in magnetoresistance and energy gap changes between the two materials.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Multidisciplinary Sciences
Chen Lin, Zijun Zhang, Zhenbang Dai, Mengjiao Wu, Shi Liu, Jialu Chen, Chenqiang Hua, Yunhao Lu, Fei Zhang, Hongbo Lou, Hongliang Dong, Qiaoshi Zeng, Jing Ma, Xiaodong Pi, Dikui Zhou, Yongjun Wu, He Tian, Andrew M. Rappe, Zhaohui Ren, Gaorong Han
Summary: Single-crystal ferroelectric oxide films were successfully epitaxially grown on Nb-doped SrTiO3 single-crystal substrates through a solution reaction at a low temperature. The epitaxy was mainly driven by an electronic polarization screening effect at the interface. Atomic-level characterization revealed a nontrivial polarization gradient throughout the films, possibly due to a structural transition. This polarization gradient generated an extremely high photoresponsivity, surpassing that of other known ferroelectrics.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Analytical
Wei Hang, Chao Song, Ziliang Yin, Ye Liu, Qifan Wang, Yinggang Wang, Yi Ma, Qiaoshi Zeng
Summary: This study investigates the effect of various factors, such as rotational speed, abrasive size, polishing pressure, and oxidant concentration, on the chemical mechanical polishing of amorphous alloys. The Taguchi method is used to optimize the processing parameters, and the AFM and XPS techniques are employed for surface characterization and oxide film composition analysis, respectively. The results reveal the optimal process parameters and the impact of abrasive size and oxidant concentration on material removal rate and surface roughness. The findings offer valuable insights into achieving satisfactory polishing effects for zirconium-based amorphous alloys.
Article
Materials Science, Multidisciplinary
Mingjuan Cai, Jingjing Wang, Qianqian Wang, Zhijun Guo, Qiang Luo, Jing Zhou, Tao Liang, Xuesong Li, Qiaoshi Zeng, Baolong Shen
Summary: Stress annealing is used to enhance the magnetic softness of Fe83-xCoxB10Si3C3P1 (x = 0-16) amorphous alloys with a saturation polarization of up to 1.75 T. The stress-annealed alloys exhibit improved soft-magnetic properties, including low coercivity (1.8-2.2 A/m), low core loss (0.09-0.11 W/kg at 1.0 T and 50 Hz), and high permeability (27,000-33,200 at 5 A/m and 1 kHz). The enhanced magnetic softness is attributed to the induced longitudinal magnetic anisotropy and the annihilation of free volume caused by stress annealing.
MATERIALS RESEARCH LETTERS
(2023)
Article
Physics, Multidisciplinary
Qiaoshi Zeng
Summary: With the development of new synchrotron radiation x-ray sources, high-energy x-ray photon correlation spectroscopy measurements can now be performed on materials in a diamond anvil cell, providing essential information on atomic dynamics that was previously inaccessible. This technique offers opportunities to address critical scientific challenges and study novel phenomena under extreme conditions.
MATTER AND RADIATION AT EXTREMES
(2023)
Article
Materials Science, Ceramics
Qifan Wang, Hongbo Lou, Yoshio Kono, Daijo Ikuta, Zhidan Zeng, Qiaoshi Zeng
Summary: This study measured the viscosity of a metallic glass-forming liquid and found an abrupt drop at pressures between 3.2 GPa and 3.7 GPa, suggesting a possible pressure-induced liquid-to-liquid transition. Pressure could also affect the short- and medium-range orders in the multicomponent glass-forming liquid.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)